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Leases (Details)	3 Months Ended
	Mar. 31, 2022
Leases [Abstract]
Lease expiration period, description	Our leases have original lease periods expiring between 2021 and 2025.

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- Definition

Description of lease expiration period.

+ References

No definition available.

+ Details

Name:	crex_LeaseExpirationPeriodDescription
Namespace Prefix:	crex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration